I have spent eh last 4 hours running down the wires in the car and they go as follows:

Big red wire on alt goes to negative side of amp gauge, positive side of amp gauge goes to battery cable on solenoid......The amp gauge is wired into the charging circuit... is this correct...? from the drawings it is not...nothing should be in between the alt. and the battery cable leading to the battery....

The resistor is the other issue and I think a ignition ballast resistor is the wrong thing to use...I'm going to look into that today at radio shack.

Other than that "I'm a happy camper"
Being a show car I think I will crank it today and change the oil...